Metallic annealing-box



H. HOWE.

memuc mmuuc aox. vAPPLICATICW FILED AUG.5| 1920. '1 ,360,639 Patented Nov. 30, 1920.

2 SHEETS-SHEET I.

- show-M200 WHIMM H. HOWE.

METALLIC ANNEAL'ING BOX.

APPLICATION FILED AUG.5, I920.

Patented Nov. 30, 1920.

2 SHEETS-SHEET 2.

WWW

: m'r ums PATE err-IC HARRY HOWE, OF IBELLEVUE, PENNSYLYANIA,"AS SJ IGNOR TO PRESSED STEEL CAR COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATE)! OF NEW- mn'mnmc Annamaria-Box.

' Specification of Letters latent.

Patented Nov eo, 1920'.

Application filed August 5, 1920. Serial No. 401,459.

Boxes, of which the following is a specification.

1 An object of the present invention is to provide an air-tight metallic annealing box which can be easily and cheaply manufactured, and which will be light in weight and strong, and capable of resisting the tendency to collapse under the intense heat to which such annealing boxes aresubjected.

Another object of the invention is to provide an annealing box which is constructed of a plurality of sheet metal parts and which have their adjacent edge portions welded to each other. I

Referring to the accompanying drawings in which like reference characters refer to like parts, Figure 1, is a plan view of an annealing box constructed in accordance with'the invention; Fig. 2 is a side elevational view and Fig. 3 is an end elevational View of the same; and Figs. 4, 5, and 6 show similar views of a modification of the invention.

Referring now in detail to the drawings, reference characters 1 and 2 indicate the end walls of the box which are preferably identical in form. Each end wall consists of an end wall proper 3, and an upper portion 4:,

forming a part of the roof of the box, the lower portion 3 being provided with flanges 5 at its sides, and the upper portion 4 being prov-idedwith similar flanges 6 which converge and meet each other. The side walls 7 and 8 are preferably identical in form each having sides proper or vertical portions 9 and upper portions 10, which latter portions form portionsof the roof of the box. These are provided with flanges 11v on their side portions and the upper portion of these side walls are provided with converging flanges 12, and a flange 13 extending preferably along the longitudinal center line of the box;

' The flanges 5 and ll contact with each other and are electrically welded together at spots throughout their lengths, as also are the flanges 6 and 12 as well as the two flanges 13.

To render the box air-tight the joints between the various flanges referred to are sealed throughout their lengths by welding them together, which welding may be done by means of electricity or by any other suitable or convenient means.

It will here be noted that the crown or top of the box when constructed in accordance with the invention is of a curved or arched form and hence is well adapted to heat to which the box is subjected.

Figs. 4, 5, and 6 show a modification of the withstand collapse due to the high degree of invention in which the end walls 14 are preferably identical in form each having a flat portion 15 provided with flanges 16 which are continuous around three sides of the end.

- The side walls 17 are also preferably identical in form, each side wall forming notonly the side proper 18 of the box but also half of the crown 19 of the box. The upper or crown portion 18 of the side wall is provided with an edge flange 20 which contacts" with and is welded to a similar flange on the edge of the plate forming the other side of the box. It will be seenfrom the drawings that the end portions 6f the side walls contact with the flanges 16 of the end'walls, and may be welded thereto by electricity or any other the ends of the box, for lifting purposes, as shown in the drawin s.

Having thus descri ed the invention What suitable means. Lugs 21 may be secured to and flanges for securing together said sides and ends. v

2. An annealing box comprising sides and tions being connected together by flanges which converge toward the center'of the box.

' ends, portions of said sides and ends form; ing portions of the roof of the box, said por- 3. An annealing box comprising side and end walls, said side andend-walls having substantially V-sha ed upper ortions which form. portions of t e roof'o .the box and flanges on said V-shaped portions for secur- In testimony whereof I afiix my signature ing them to each other. in the presence of two Witnesses.

4. An annealing box comprising side and HARRY HOWE end Walls, said end Walls having upper por- '5 tions Which form a portion of the roof of Witnesses:

the box and flanges for securing said ends J. J. CLARKE,

and sides together. C. D. RENNE; 

